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People can eat the estival fruits such as watermelon and strawberries in winter, but the price of these out-of-season fruits are very expensive. The nutritionists recommend that you’d better eat cheap seasonal fruits. Because the food value of the out-of-season fruits is not high and its price is expensive so that they are not suitable for regular edible. People eat the out-of-season fruits for their fresh feeling, but it has no nutrition. Those gorgeous out-of-season fruits are often planted in the greenhouse. Its insolation and the level of the soil are different from the seasonal fruits. Therefore, the seasonal fruits have the best nutrition and its price is cheap. You’d better buy certain amount of fruits you can eat up, because each fruit has its suited storage temperature and shelf life. If you put the fruits too long, the fruits’ nutrition and aroma will be bad. Most fruits can be directly put into the refrigerator, otherwise these fruits will be perishable easily and you’d better eat them within a week. These fruits such as banana, pineapple, mango, papaya and lemon are needed to put in the shady and cool corner, and should not be refrigerated too long. In addition, some illegal pedlars use the chemical reagent to accelerate the ripening of the out-of-season fruits in order to sell these fruits, so the out-of-season fruits may do harm to your human health. If the middle of the strawberry is hollow, or its shape is irregular large, these are resulted from the overuse of hormone. The strawberry is used with ripener and other hormonal medicines, its growing season will be shorter and its color will be fresh, but its fruity will be tasteless. Some illegal pedlars and orchard workers use ripener such as ethephon to accelerate the ripening of grapes. Although the toxicity of ethephon is low, it will do harm to your body if you eat grapes with ethephon for a long time.
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